Improvement in coal-sifters



UNITED STATES PATENT EEICE.A

JAMES STURGIS PEARCE, OF NORTHAMPTON, MASSACHUSETTS.

IMPROVEMENT IN COAL-SIFTERS.

Specification forming part of Letters Patent No. 158,808, dated January19, 1575; application led December 15, 1874.

To all whom it may concern:

Be it known that I, JAMES S. PEARGE, ot

Northampton, .in the county of Hampshire,

' accompanying drawing forming a part of this specification, in which-Figure l is' an isometrical perspective view o' a sitter constructedupon my improved p an.

My invention relates'more especially to that class of coal-sitters inwhich the screens are housed or inclosed in a cabinet to confine theashes and dust; and consists in a novel construction and arrangement ofthe parts, as hereinafter more fully set forth and claimed, by which asimple, cheap, and ei'ective device is produced.

In the drawing, A is the case or cabinet; B, the hopper; and G thehopper-slide. The hopper is disposed near one side of the case, the coalinV passin through it falling upon the upper end ot th long screen D,which is arranged diagonally across the body of the cabinet, as shown.Between the lower end of 'the screen 1) and the side ot' the cabinetthere is an opening, z, and beneath this opening a short screen, E,having liner meshes, and inclined iu a directionl opposite to that ofthe long screen. Near the-lower end of the screen D, and above theopening z, there ,is a chute, I, arranged in paralleli-sm with thescreen E, the lower ends of the'last-named screen and of the .chutebeing supported by the crossgirders u a. A drawer or pan, H, is arrangedin the lower part of the cabinet, into which it slides transverselythrough an opening in the side which supports the upper end of thescreen D. A drawer, F, is fitted to slide -in an aperture in the door K,and is arranged in such a position with respect to' the other parts ofthe sitter that when the door is closed, the drawer will be supportedcentrally over the drawer H, and immediately under the opening betweenthe short screen E and chute I. The drawer F has a sliding bottom, G,and a short distance above this there is a wire-screen, a part of whichis rep resented in the drawing as removed, in order to show the spacebetween the screen and bottom.

From the foregoing the nature and opera tion of my invention will bereadily understood by all conversant with such matters.

The coal to be si'fted is poured into the hopA per B, and falls upon theupper end of the screen D, over which it passes, and, through theopening z, falls upon the screen E, and thence into the drawer F. Inpassing the screen D the bulk of the ashes will be separated from thecoal and fall through the meshes of the screen upon the chute I, passingthrough the opening J into one end of the drawer H. On striking thescreen E, a large proportion of the ashes which have passed over thescreen D will be separated from the coal and fall through the screeninto the 0pposite end of theA drawer. A small quantity of ashes,however, will generally adhere to the coal until it is deposited in thedrawer F. This is separated by shaking the door in which the drawer F issupported, thus agi tating the coal, and causing the ashes to fall intothe lower part of the drawer, from whence they may be removed by meansof the slide G.

It will be seen that the door K not only performs the office ot' closingthe cabinet and preventing the ashes and dust from escaping, but aliordsa convenient means of sifting the coal in the drawer F,"after it haspassed the screens D E.

I sometimes hinge the screen in the drawer F in such a manner that itmay be dropped or attached to slides, so that it may be withdrawn afterthe ashes have been removed by l means ot' the slide G, as described,thereby enabling the coal to be discharged directly into a hod or othervessel without removing the drawer from the door.

Having thus described myinvention, what I claim isln a Vcoal-sitter,constructed substantially -as described, the drawer F,- combined tooperate with the door K, screens D E, and drawer H, substantially in themanner and for the purpose specied.

JAMES STURGIS PEARGE. IL. su] Witnesses: p

DAVID W. CRAFTS, CHAs. S. BARTLETT.

